Question

The measures of two adjacent angles of parallelogram are 4:5 find the measure of each of the angle of 11gm ?​

Answer 1

sum of the adjacent angles in any parallelogram= 180

ratio of adjacent angles = 4:5 (given)

let first angle = 4x

second angle = 5x

4x+5x=180

9x=180

x=180/9

x= 20

therefore

required angles are

first angle = 4x= 4*20 =80

second angle = 5x= 5*20 =100

Answer 2

Answer.

sum of adjacent angles in any parallelogram =180°

ratio of adjacent angles = 4:5 (given)

let first angle =4x

2nd angle. =5x

4x + 5x = 180

9x = 180

x = 180/9

x = 20

therefore angels are..

4(x) = 4*20 = 80

5(x)= 5*20 = 100